Duplex folder



Aug. 28, 1928.

1,681,949 2. v. MORVAY DUPLEX FOLDER Filed Sept. 16, 1926 2 Sheets-Sheetl 3 Z0472 /VOF?VAY,

Aug. 28, 1928.

2. v. MORVAY DUPLEX FOLDER Filed Sept. 16, 1926 2 Sheets-Sheet 2INVENTOR.

,Z, 1/ MORYAY,

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' combination of parts described hereinafter Patented Aug. 28, 1928.

UNITED STATES PATENT OFFICE;

Application filed September 16, 1926. Serial Ho. 185,757.

My invention, in its broad aspect, has reference to improvements inattachments for sewing machines, especially of the double needlevariety, whereby elastic webbing or tape, or for that matter ribbon,bind ng, facing, tape, or the like, may be sewn into textile materialwithout the utilization of a separate strip of material or facing strlp.Material so provided with elastic inserts are common in the manufactureof bloomers, rompers, drawers, garters, and the like, but so far as I amaware, my present invention is unique in accomplishing this result bymeans of an S- shaped fold in the material in one of the loops of whichthe elastic is trained and sald loop sewn down to form the tube forretaining the elastic, and reinforcing the portions of the materialadjacent the same. To this end I have provided novel mechanism which maybe set up in conjunction with a conventional form of sewing machine tothe end that the operations of tucking, sewing, and placing the elasticmember will he accomplished mechanically and with faclhty.

In addition to the above, other and equally important advantages of myinvention may be briefly defined as follows; first, I provide a, pair oftuck forming members or plates, one of which is S-shaped, and has formedtherein by one of the loops of the S-shaped configuration a tube whichholds and trains the elastic member, thereby simplifying the structure;second, all parts of my device are positive in operation; third, bindingof any of the parts is prevented; fourth, the apparatus may be attachedto an ordinary sewing machine without materially altering any of itsparts; fifth, there are no fraglle or concealed parts which might easilyget out of order, and any of the parts may be readily replaced orcleaned, and; sixth, the assembly is capable of being manufactured atrelatively small cost and sold at a reasonable retail price.

To these and other ends, my apparatus consists in the construction,arrangement and illustrated in the drawings, and defined in the claimsforming a part of this specification.

One embodiment of my invention is represented by way of example in theaccompanying drawings, wherein Figure 1 is a substantially diagrammaticview of a sewing machine, shown in perspectlve, and having my attachmentmounted thereon;

Figure 2 is a reduced detail view ofa port1on of the mechanism, and

Figure 3 is an enlarged perspective view showing the principal parts ofmy invention 1n their relative working positions.

F1gure 1s a diagrammatic erspective view showing the several parts mydevice in detail, and in their working relationship to each other. e

In the drawings wherein like characters of reference are used todesignate like or simllar parts throughout the several views (1)designates a sewin machine of the double needle varietyand aving a foot(2), spools 3), and a work support (4) beneath WlllCll IS the bobbinstructure (not shown). Mounted beneath the machine is a spool of elasticmaterial or tape (5) which is fed through an opening (6) to the worksupport where it 1s received by my machine in the manner which will beMy invention contemplates the provision of two plates (7) and (8), thelower most plate (8) being S-shaped and having an extension (9) adustably secured as at (10) to a guide rod (11) which is pivotallyengaged as at (12) by the link connection to the crank (13), the otherarm of which is fixed to a shaft (14). The shaft (14) is journalledthrough abracket (15) mounted upon the work table or support (4) of thesewing machine and which has two upright, spaced arms (16) forming theshaft journalling and supporting members. The shaft has fixed thereon anarm (17), and at its end another arm (18). A spring (19) normally urgesthe shaft to position the arms (17) and (18) as in Figure 2.

Pivoted to the arm (17) is a link (20) which is connected atits oppositeend with a foot or lever arm (21) pivotally attached to a bracket (22)carried b the sewing machine The foot or lever arm (21) is curveddownwardly at its free terminal and has thereon a nickeled steel cap(23). The arm (18) is connected by a link (24) to a transverse rod(25)shown in. dotted linesjournalled beneath the work sup ort or table(4), and attached thereto is a ee-presser member (26), so that when saidmember (26) hereinafter described.

.is pressed b the operator, the motion is transmitted to t e foot orlever arm (21) to cause the cap end' (23) to move forward. Interposed inthe path of movement of the lever arm or foot (21) is a rod (27) havinga head or cap (28) for contact with the foot (23). The rod (27 isjournalled through an ad ustable clamp (29) throughwhich extends thepre'sser footbar (30) shown 1n dotted hnes in Figure 3-and a brassbearing member (31) fits about the rod (27) to properly 1ournal thesame. A spring (32) is oi the double acting variety and holds the rod,normally in a retracted position and has its'ends attached to the clamp(29) and cap (28) so that'the rod (27) is normally urged to its upperposition as shown in Figure 1 from which it is forced outwardly fromtime to time by the bellhanger or foot (21) when the operator pressestheknee-presser member (26). The rod (27 is bent intermediate its lengthas at (33) and is attached to plate (7) of my mechanism which same isbent to conform substantially to the shape of one of the loops in plate(8). Thus, when knee presser member (26) is pressed the rod (27 isforced forward to ride over the end of the guide or stop trip (24),consequently when the knee presser member is released the expansionaction of the spring (32) causes itto ride down beneath the trip (34:)to engage the folder plates to form the tuck. The spring (32) isnormally wound up, after the manner of a watch spring, so that thelatter action is against the action of the spring in unwinding it butwith the action of the spring in the exertion of its expansionforce.Stop pins (35) are mounted on the rod (27) to prevent it from binding orjamming. In Figure 1 the plate (7 is swung up from the work table orsupport, but the spring (32) normally holds it in the position shown inFigure 1. a

The material (36) is fed into the machine and the plates (7 and (8) aremoved toward each other to tuck the material as shown at (37) and (37')the elastic tape is carried in the tube portion, 39) formed by theS-shaped conformation 'otithe plate (8), and is fed into tuck (37)whereupon the tucks (37) and (37) are stitched down as at (40) forming areinforcedtube for the elastic member. The material ,is also tucked inthe usual manner at intervals transversely of the elastic member by thepresser foot of the machine and the natural -retractile properties ofthe elastic; The elastic member is carried from the opening (6) fromspool (5) through guide slots 11) and (4:1') in extension (9) of plate(8) to the tube portion (39) thereof'so that binding and the like isprevented. When the tuck has been stitched down the knee member is againpressed which moves the tucking plates 7 and 8 apart and causes rod 33to ride up on the trip member (34) to assume again the position shown inFigure 1. The upward movement of the rod is caused by the expansionforce of the spring (32 The operation of my device can be rea ilyunderstood by reference to Figure 4 which is a diagrammatic view of minvention showing the relationship of t e parts during the cycle ofoperation. In the full line position, the parts are shown in a neutralposition or with the plates 7 and (8) in position to form the tuck. Theknee presser member (26) is released or down and the spring (32)expanded. Suppose now that it is desired to form a tuck in a new pieceof stock; the knee presser member 26) is moved to the right, drawingdown t e rod (24:) and link (18) this turns the shaft (14:)

against the force of spring (19) and moves the arm (17) back,-thusdrawing the rod (20) to tilt up the member (21) as shown in dottedlines. The capped end (23) of member 21 then presses on head (28) tocause rod 27 carrying plate (7 to move out. However, the spring (32) isof the double acting variety and is normal y wound up, after the mannerof a watch spring, thus the plate will be urged up along the guide (34by the spring to take the position shown in otted lines (or in fulllines in Figure 1) The stock is then inserted and the knee pressermember released, whereupon spring (19) will cause the knee-pressermember to move to the left, and the remaining elements in conjunctiontherewith will again be moved to the full line position including therod (20) and member (21), The head (28) will be forced out by pressureof spring (32) drawing the rod (27 down along the guide or trip (34:),and disposing the plate (7) in the full ine position to tuck the stock.The stock is now ready to be stitched along the tuck with the elasticmaterial in place. Attention is again directed to the fact that by mymachine elastic material or tape may be incorporated into the stocksimply by forming an Sshaped tuck therein, whereas heretofore it hasbeen customary to secure the elastic in place by a separate facingstrip.

To these and other ends, my machine consists in; the constructiondefined in the appended claims, but it is desired to emphasize the factthat interpretation of the invention should only be conclusive when madein the light of the language of such claims.

1. An attachments for sewing machines comprising a pair of plates, meansfor actuating said plates toward and away from each other, one plate.havingan s shaped crosssectional curvature for cooperation with theother plate to form a tuck in material passed between the plates, andsaid S-shaped plate having a tube formed by one of its bends to receiveand guide a tape element to position in the tuck for the purposedefined.

2. An attachment for sewing machines comprising a pair of plates, meansfor actuating said plates toward and away from each and said S-shapedplate having a tube formed other, one plate having an S-shaped crossb?one of its bends to receive and ide a tape sectional configurationthroughout its length, e ement to osition in the tuck or the purtheother plate being curved to simulate the pose definetll b curvature of aportion of the other plate and In testimony whereof, I affix mysignature adapted to cooperate therewith to form a hereunto.

tuck in material passed between the plates, 'ZOLTAN V. MORVAY.

